A372875 - cp's OEIS frontend

A372875 Irregular triangle read by rows: T(n,k) is the number of flattened Catalan words of length n with exactly k symmetric valleys, with k >= 0.

n	a(n)
1	1
2	2
3	5
4	13
5	1
6	34
7	7
8	90
9	31
10	1
11	242
12	113
13	10
14	659
15	375
16	59
17	1
18	1808
19	1189
20	271
21	13
22	4977
23	3686
24	1082
25	96
26	1
27	13715
28	11284
29	3976
30	534
31	16
32	37798
33	34239
34	13887
35	2507
36	142
37	1
38	104154
39	103115
40	46949
41	10555
42	929
43	19
44	286960
45	308452
46	155200
47	41324
48	5028
49	197
50	1

[1, 2, 5, 13, 1, 34, 7, 90, 31, 1, 242, 113, 10, 659, 375, 59, 1, 1808, 1189, 271, 13, 4977, 3686, 1082, 96, 1, 13715, 11284, 3976, 534, 16, 37798, 34239, 13887, 2507, 142, 1, 104154, 103115, 46949, 10555, 929, 19, 286960, 308452, 155200, 41324, 5028, 197, 1]

cp's OEIS Frontend

A372875 Irregular triangle read by rows: T(n,k) is the number of flattened Catalan words of length n with exactly k symmetric valleys, with k >= 0.

Table of values

List of values